hello, what is she sleeping during the day? IMO she really shouldn't need 2 hrly feeds overnight and I honestly don't know how you cope with that amount of broken sleep! I know I couldn't of done that and I didn't have an older child to worry about!
Ok I would start the day with a bf at 7am ish and baby cereal breakfast, I would hope your baby would have a sleep when you take your son to nursery in the buggy or car.
Offer bf at 11ish and once you have collected your son do some sort of baby lunch,
the put your baby down for a sleep.
offer another bf when baby has woken up from sleep and then baby tea at 5ish
aim for bed at 7pm with another bf just before.
I would wake your dd up at 10pm and offer a feed and then I would not feed her again until the morning, just offer water in a beaker.
This will be hard for the first couple of nights but IMO well worth it!
I also know there will be some mums on here that really won't agree with me but that is what I did and my dd has always (touch wood) slept well and goes 7 - 7.30 to this day (she is now nearly 3)
Good luck and hope that helps Xx